A powerful five-minute reconstructor that rebuilds and strengthens stressed, physically and/or chemically treated hair. Lost or depleted amino acids are replenished with a high concentration of Quadramine Complex for maximum reconstruction and protection from the cuticle to the cortex. With the use of Joico K-Pak Deep-Penetrating Reconstructor for Damaged Hair, weak and damaged hair is restored to its original strength and condition, helping to prevent colour loss and making your hair more responsive to styling. pH 4.5-5.5. Contains Guajava Fruit Extract packed with anti-oxidants & Lycopene to help protect hair against UV damage. Blended with Evening Primrose Oil. The Joico K-PAK Deep Penetrating Reconstructor Treatment is great for damaged hair. It will leave your hair shiny, strong, manageable and healthy looking. The K-PAK Reconstructor contains the highest amount of Quadramine Complex than any other product in the Joico family. This product also results in an immediately noticeable difference in strength, texture and appearance to your hair. Directions of Use: Apply to your shampooed hair, Leave in for 5 minutes, Rinse thoroughly.